function changeContent(o){
	var request=new XMLHttpRequest();
	request.open("GET","AJAXPageHandler",true);
	request.onreadystatechange=function(){
		if(request.readyState==4){
			if(request.status==200){
				document.getElementById('content').innerHTML=request.responseText;
			}
		}
	};
	request.setRequestHeader("page", o.href);
	request.send();
}